Use the each ion completely in the space provided. SHow WORK for all calculation

Question

Use the each ion completely in the space provided. SHow WORK for all calculations. KMT to explain the in volume of gas Describe the changes temperature, pressure, and all 2) A gas with a pressure of 720mm Hg and temp 33 is heated to 88 C at constant volume, What is the new of 3) A gas with a volume of 3.8L at 20 C is heated until it has a volume of 69 L. What is the final temperature? V, 3.8L T, Vi V2 11 C 4) what is the dens f argon gas at 25°C and 1.00 atm? ART f, latn Toss what pressure would you expect from a 35 mol sample of He gas at 20 c in a 5Lcontainer?

Explanation / Answer

2) Using,

P2/T2 = P1/T1

with,

P1 = 720 mmHg,    P2 = ?

T1 = 33 oC             T2 = 88 oC

we get,

new pressure (P2) = 720 x 88/33 = 1920 mmHg

3) Using,

T2 = T1V2/V1

with,

T1 = 20 oC        V1 = 3.8 L

T2 = ?                V2 = 6.9 L

we get,

New temperature (T2) = 20 x 6.9/3.8 = 36.31 oC

4) Using,

density = P x MM/RT

with,

P = 1 atm, MM = 40 mol/g, R = gas constant, T = 25 + 273 = 298 K

we get,

density of argon = 1 x 40/0.08205 x 298 = 1.636 g/L

5) Using,

Pressure of He = nRT/V

with,

n = 3.5 mol, R = gas constant, T = 20+273 = 293 K, V = 5 L

we get,

Pressure = 3.5 x 0.08205 x 293/5 = 16.83 atm

6) moles H2 = 15/22.4 = 0.67 mol

grams H2 gas = 0.67 mol x 2 g/mol = 1.34 g

7) grams of WO3 needed

= 25 x 231.84/22.4 x 3

= 86.25 g

8) Pressure of H2 = nRT/V

                             = (0.0456/24)(0.08205)(22+273)/0.0356

                             = 1.292 atm

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